1923] NATURAL SCIENCES OF PHILADELPHIA 179 



THE POLYCH^TOUS ANNELIDS DREDGED BY THE U. S. S. "ALBATROSS" 



OFF THE COAST OF SOUTHERN CALIFORNIA IN 1904. 



IV. SPIONIDAE TO SABELLARIIDAE. 



By J. Pekcy Moore 



Three parts of this paper dealing with the Nereidiformia of the 

 "Albatross" collections have been published in these Proceedings 

 as follows: I, 1909, pp. 321-351, Plates XV and XVI; II, 1910, 

 pp. 328-402, Plates XXVIII-XXXIII; III, 1911, pp. 234-318, 

 Plates XV-XVI. The long delay in the appearance of this fourth 

 and concluding part is due to several unavoidable circumstances. 

 The paper Avas practically completed in 1911, but before submission 

 for publication the entire manuscript including the figures was 

 unaccountably lost. For a long time, the author was reluctant 

 to believe that it would not be recovered, and took no steps to 

 replace it. Later, he became completely occupied with ()th(>r 

 work, and only recently has found time to rewrite it. 



The text has now been prepared chiefly from the original notes, 

 but supplemented by some additional studies. Some of the draw- 

 ings have been replaced, and appear on the plates, but unfortunately 

 it has been impossible to redraw all of the figures and as a result 

 this part is less fully illustrated than the others. 



In the meantime, several of the species named as new in the 

 original MS. have been described by others, as referred to in the 

 text. The types of all new species are in the collection of the U. 

 S. National Museum, and a set of cotypes and duplicates is de- 

 posited at this Academy. 



SPIONIDAE 

 Spiophanes fimbriata sp. nov. 



The type and most complete example consists of the prostomiuni 

 and forty setigerous segments, having a length of 22 mm. and a 

 maximum width, including i)ara]KKlia, at the fifth setigerous 

 somite, of 2.8 mm. 



Prostomiuni subtriangular with the somewhat truncated apex 

 posterior and the l)ase anterior and slightly concave, the angles 

 rounded, and the sides concave anteriorly, slightly convex jioster- 

 iorly toward the apex. Kim all around a sligiitly raised welt, 



